Search for Advanced LIGO Single Interferometer Compact Binary Coalescence Signals in Coincidence with Gamma-Ray Events in Fermi-GBM

Abstract

Presented is the description of a new and general method used to search for $\gamma$-ray counterparts to gravitational-wave (GW) triggers. This method is specifically applied to single GW detector triggers. Advanced LIGO data from observing runs O1 and O2 were analyzed, thus each GW trigger comes from either the LIGO-Livingston or the LIGO-Hanford interferometer. For each GW trigger, Fermi Gamma-ray Burst Monitor data is searched and the most significant subthreshold signal counterpart is selected. Then, a methodology is defined in order to establish which of GW-$\gamma$-ray pairs are likely to have a common origin. For that purpose an association ranking statistic is calculated from which a false alarm rate is derived. The events with the highest ranking statistics are selected for further analysis consisting of LIGO detector characterization and parameter estimation. The $\gamma$-ray signal characteristics are also evaluated. We find no significant candidates from the search.

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• Missed opportunities: GRB 211211A and the case for continual gravitational-wave coverage with a single observatory
• CALET Search for electromagnetic counterparts of gravitational waves during the LIGO/Virgo O3 run
• A Joint Ranking Statistic for Multi-messenger Astronomical Searches with Gravitational Waves
• Detecting and Diagnosing Terrestrial Gravitational-Wave Mimics Through Feature Learning
• Deep Multimessenger Search for Compact Binary Mergers in LIGO, Virgo, and Fermi/GBM Data from 2016-2017
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